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Which of the following pair of orbitals ...

Which of the following pair of orbitals for mentioned species have equal energy :

A

`2s(He^+) and 4p(H)`

B

`8p (He^+) and 6s (Li^"2+")`

C

`6s (He^+) and 18s(Be^"3+")`

D

`4p(He^+) and 8d(Be^(3+))`

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